Nut-lock.



No. 669,838- Patented mar. l2, |901.

J. w. Jones L J. HELMEH.

NUT LOCK.

(Application ledSepL. 11, 1900.)

(Nu Model.)

WHA/555155; iibmldm FFICZ..

JOHN WV. JONES AND JOSEPH HELMER, OF GRAND RAPIDS, MINNESOTA.

NUT-LOCK.

L'ECIFICATIO forming 'part of Letters Eaten't No. 669.838, dated March12, 1901.

Application tiled September l1, 1900. Serial No. 29,679. (llo model.)

To (1J/.l whom, it' nil/Ly con/067%:

Be it known that we, JOHN W. JONES and JOSEPH I-IELMER,citizens oftheUnited States` residing at Grand Rapids, in the county of Itasca,Stateof Minnesota, have invented certain new and useful Improvements inNut- Locks, of which the following is a description, reference being hadto the accompanying drawings, and to the letters of reference markedthereon.

Our invention relates to that class of nutlocks in which a ilat plate orwasher having a hole therein for the passage of the bolt is placedbeneath the nut, and beingkept from rotation by engagement with thebase-plate through which the bolt extends has one or more projectingportions bent up to engage the nut after it has been screwed down toplace and prevent its rotation.

Our invention consists in the construction and combination of elementshereinafter described and claimed.

In the accompanying drawings, which form a part of this specification,Figure lis a plan view, and Fig. 2 is a side view, of one form of ourinvention. Fig. 3 is a plan View of a modification. Fig. 4 is a sideview of the form of our invention shown in Fig. 3. Fig. 5 is across-sectional view of the same. Fig. 6 is a plan and Fig. 7 asectional view showing a inodication in the means for securing thebase-plate against rotation, and Fig. 8 is a plan view of a fish-platefor rail-joints having our invention applied thereto.

In the drawings, A is abase-platethrough which the bolt B passes andagainst the upper surface of which the nut O presses.

D is the locking-plate by which the nut is held from rotation.

The base-plate Ais prevented fromrotation in the construction shown inFigs. l to 5 by means of projections a on its under side, which enterholes or grooves in the material of the article to be held in place bythe bolt. If the article to be held in place is metal, it Will benecessary to cut recesses in its face to receive these projections. Ifthe material is wood, the projections will usually be forced into thewood without cutting such recesses.

In the form shown in Figs. 6 and 7 the baseplate A is prevented fromrotation by means of screwsct, having angular heads a2, which arereceived in recesses c3, out, preferably, in the edge ot' thehase-plate. In using this form of our invention the screws a will first.be entered in the material of the article to be held in place by thebolt and the base-plate placed over tliem, with the recesses asengagingthe screw-heads.

In case a base-plate having two or more bolts passing therethrough isused, as the fishplate shown in Fig. 8, the base-plate will be held fromrotation by its engagement with the flange and base of the rail, andwill be further held from rotation by the several bolts. In the upperface of the base-plate a broad shallow groove A' is cut in which thelocking-plate D rests. This groove A' is Slightly less in width than thewidth of the nut C, so that the nut in turning bears upon the uppersurface of the base-plate. The edges of the groove A' are undercut at t4and the edges of the plate D are correspondingly beveled, so that itwill beretainedin position when the nut is removed.

In the form shown in Figs. l and 2 the portions D, which extend beyondthe nut O, are made narrow, as shown, and when bent upward to hold thenut from rotation iit into recesses C, cut in opposite edges of the nut,and when forced into place and dressed off give a nished appearance.

In the form shown in Figs. 3 to 5, inclusive, the outer portion of theupper surface of `the base-plate is cut away, as shown at 0.5, leaving acentral boss on which the nut bears. By thus cutting away the uppersurface of the base-plate the portions of the locking-plate D whichproject beyond the nut are freed from engagement with the undercut edgesof the groove A and may be bent up, as shown, against the edges of thenut to hold it from rotation.

In operation the locking-plate D will be placed in position on thebase-plate, and the latter is then placed over the projecting end of thebolt and the nut screwed on. The

projecting portions of the plate D are then i IOO that it may be appliedto nuts having six or any even number of sides.

Having thus described our invention, what We claim, and desire to secureby Letters Patent, is-

l. In a nut-lock, the combination with a base-plate having a groove withundercut edges in its upper face, means for preventing the rotation otthe base-plate, a bolt passing through the base-plate and a n ut on saidbolt, of a locking-plate having beveled edges engaging the undercuts ofthe' groove and having portions thereof projecting beyond the nutadapted to be bent upward to prevent the rotation ofthe nut;substantially as described.

2. In a nut-lock, the combination with a base-plate having the outerportion of its upper face cu t away so as to leave a central boss andha-ving a groove with undercut edges in its upper face, means forpreventing the rotation of the base-plate, a bolt passing through thebase-plate and a nut on said bolt, of a locking-plate having bevelededges engaging the under-cuts of the groove, and having portions thereofprojecting beyond the nut ad apted to be bent upward to prevent therotation of the nut; substantially as described.

3. In a nut-lock, the combination with a base-plate having a groove withundercut edges in its upper face, and recesses in its edge, screwshaving angular heads fitting said recesses, a bolt passing through thebaseplate and a nut on said bolt, of a lockingplate having beveled edgesengaging the undercuts of the groove and having portions thereofprojecting beyond the nut adapted to be bent upward to prevent therotation of l[he nut; substantially as described.

4. In a nut-lock, the combination with a base-plate having a groove Withundercut edges in its upper face, means for preventing the rotation ofthe base-plate, a bolt passing through the base-plate, and a nut on saidbolt having recesses in opposite edges, of a locking-plate havingbeveled edges engaging the undercuts of the groove and having portionsthereof projecting beyond the nut and adapted to be bent upward into therecessesin the edges of the nut, and to thus prevent the rotation of thenut; substantially as described.

In testimony whereof We affix our signatures in presence of witnesses.

JOHN W. JONES. JOSEPH HELM-ER.

Witnesses to the signature of John W. Jones:

E. H. SKILLE, Y C. L. IsTED.

Vitnesses to the signature of Joseph Helmer:

A. P. GREELEY, GRACE P. BRERETON.

